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Finding the Fourth Proportional to 49.00, 67.61 and 28.28

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Solution

The fourth proportional to 49.00, 67.61 and 28.28 is: 39.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.00 : 67.61 = 28.28 : x
  2. Step 2: Convert to fraction form
    49.00/67.61 = 28.28/x
  3. Step 3: Cross multiply
    49.00x = 67.61 × 28.28
  4. Step 4: Simplify right side
    49.00x = 1,911.87
  5. Step 5: Solve for x
    x = 1,911.87/49.00
  6. Step 6: Final answer
    x = 39.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.